MathMMath

Hi guys, I am still fairly new to geo-caching and the idea of differnet co-ordinate systems has always puzzled me for some reason. So I was wondering could anyone explain in simple terms how to convert between co-ordinate systems? For example, I found the co-ordinates of a mystery cache in the form Nxx°.xxxxxx, Wxxx°.xxxxxx (Which is apparently decimal degrees?) and I was wondering how I can change that into the form Nxx°xx.xxx', Wxxx°xx.xxx' which is how I input them into my app? Sorry if this is a simple question and has been asked before but I couldn't seem to find it.

Hey guys, I am very new to geo-caching (only did an hour or so). I was wondering are there any free reliable GPS apps you can download for a Samsung phone to help find caches. I was hoping this could be a free hobby rather than spending money.(Though not adverse to spending a little). I managed to find 2 or 3 last time I went but that is because I looked at the map and knew the town really well so just kinda stumbled on them eventually. Would really like to start this properly using a GPS so I can be more effective when visiting other places. Thanks in advance for any help!